Improvement in mining-drills



h UNITED STATES I-IIRAM BURK, OF MINERAL POINT, OHIO.

PATENT OFFICE. I

IMPROVEMENT IN MINING-DRILL S.

Specification forming part of Letters Patent No. 34,941, dated April 15, 1862.

To all whom it may concern:

Be itknown that I, HIRAM BURK, of Mineral Point, Tuscarawas county, and State of Ohi0,have invented certain new and useful Improvements in Mining-Drills; and I do hereby declare that the following is a full,

clear, and exact descriptionthereof, reference being had to the accompanying drawings, forming a part of this specification, in which-- Figure 1 represents a longitudinal section of the drill-stand and rear of the drill, the drill being shown in different positions, as will be more fully described hereinafter. Fig. 2 represents a front view of the stand with the drill, together with'its rocking and feeding journal removed. Fig. 3 represents a side view of Fig. 2. Fig. 4 represents, on an enlarged scale, a front view of the rocking and feeding journal of the drill; and Fig. 5 represents a modification of the holding-cap.

The need of a light, compact, and portable mining-drill has long been felt, and my drill seems to meet the demand.

In the drawings, A represents the drill stand or post, which for the purpose of lightness and strength is made hollow. Near the upper end is an opening 13, through which the drill 0 works, its rocking and feeding journal D being supported in the sides of post or stand A. Journal D is made with two journals or bearing projections a a and having a screw cut on its inner periphery, and into which the screw cut on the shank of drill 0 works. A screw is also cut on the top of post A to receive the cap or headpiece E, which is provided with an internal screw.

The operation is as follows: Post A is placed in a vertical position, with its bottom resting 011 some firm support, as at F, and then the cap or head-piece E is unscrewed, which is readily done by the operator taking hold of the hand-wheel G until its top strikes against the top of the bank or some other firm substance, as at II, when the stand or post A will be retained in such vertical position, Drill 0, together with its journal D, is now placed into the position shown in black lines, Fig. 1, the journal D having been previously screwed upon the shank of the drill before connecting or fastening on the crank-handle I. In passing journalD and its drill G into position in post A the hearing ends a a pass through the narrow openlugs 19 b in the sides of post A until they reach depressions 0, into which they drop, so that the drill can be forced forward into the bank in a direct line or inclined in any desired position, as illustrated in black, red, and dotted lines, Fig. 1. As the operator turns drill O by means of handle or crank I, the drill is caused to gradually advance into the bank, in consequence of the screw upon the drill-shank working into the screw cut in the journal D. i

To clean the drill, journal D is raised out of the depressions o and then removed, together with the drill, all of which can be done very quickly. It will thus be seen that the drill can be worked at any desired elevation or inclination, and also removed to be cleaned without even the necessity of putting in or taking out a bolt or screw.

In lieu of the cap or head-piece E to hold the post at the top, the device shown in Fig. 5 may be employed, and which consists of a nut J, placed on top of post A and provided with handles d (Z, by which the screw-shaft K can be forced up against the top of the bank or other firm substance, as fully indidicated in the drawings.

An examination of my device will show that there are no parts which are liable to get out of order, nor yet any that require any great mechanical skill to readjust if they happen to be separated, and consequently it is well adapted for use by common mining,

hands .or laborers.

That I claim as my invention, and desire to secure by Letters Patent, is

1. The combination of post A, drill C, and its rocking and feeding journal D, substantially as set forth.

2. The combination of the holding-cap or head-piece E, screw-drill O, with its rocking and feeding journal D, with the post or stand A, said parts being arranged to operate in re lation to each other, and for the purposes set forth.

I'IIRAM BURK;

Attest:

PHILIP BLACK, A. DAVIS. 

